CVE-2016-9601

ghostscript, en versiones anteriores a la 9.21, es vulnerable a un desbordamiento de búfer basado en memoria dinámica (heap) descubierto en la función de ghostscript jbig2_decode_gray_scale_image, que se usa para descifrar segmentos halftone en una imagen JBIG2. Un documento (PostScript o PDF) con una imagen jbig2 embebida y especialmente manipulada podría desencadenar un fallo de segmentación en ghostscript.

Bingchang Liu discovered that jbig2dec incorrectly handled memory when decoding malformed image files. If a user or automated system were tricked into processing a specially crafted JBIG2 image file, a remote attacker could cause jbig2dec to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only applied to Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10. It was discovered that jbig2dec incorrectly handled memory when decoding malformed image files. If a user or automated system were tricked into processing a specially crafted JBIG2 image file, a remote attacker could cause jbig2dec to crash, resulting in a denial of service, or possibly disclose sensitive information. Various other issues were also addressed.